Lumber-jack.



G.E.BVANS LUMBER JACK.

APPLIUATION FILED JAN. 30, 1912.

' 1,027,191", i Patented May 21, 1912.,

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oHAnLnsiE. EVANS, or wenn, CALIFORNIA. Y

LUMBEn-JACK.

Specification of Il'ietters Patent.

Patented May 21, 1912.

Application filed January 30, 1912. Serial No. 674,272.

To all 'whom it may concern.' i

Be it known that I, CHARLES E. EVANS,

a citizen of the United States, and a resi-4 dent of W'eed, in the county of Siskiyou and State of California, have invented a new and Improved Lumber-Jack, of which the following is a full, clear, and exact description. Y A

My invention relates to lumber jacks and it 'has for its object to provide one which may beused to assist in raisingy andA lowering lumber.

My jack is constructed to slide with a counter-balanced member fori-'engaging the lumber, the counter-balanced memberbeing pivoted to a yoke, and the yoke being-pivoted on a vertical axis to a beam, thereby permitting the jack to be moved as desired, whilekit engages and holds the lumber which isbeing moved. Y

Additional objects of the invention are to providey means to limit the movement of the yoke, and means to hold the yoke yieldingly in a predetermined position.

Still other objects ofthe invention will appear in the following complete specification in which the preferred form of the-inventionis disclosed. Y

In the drawings, similar characters of reference indicate corresponding parts in .all the views, in which- Figure l is a perspective view showing my lumberv jack in position for use; Fig. 2V

is a plan `View of thelumber jack; Fig. 3 is a sectional view on the line 3 3 of Fig. 2; and Fig. 4 is a sectional view on the line 4-4 of Fig. 3.

By referring to theV drawings Yit will` be seen that a beam 5 has a vertical bearing 6, in which is disposed Athe stud 7 of the yoke 8. Spaced fro-m the bearing 6 there is disposed on the stud 7 a kcollar 9, this collar 9 being held in placeby a set screw 10,

which meshes in the threaded orifice yl1 in the collar, and engages the side of the stud 7. A spring 12 is disposed aroundl the stud 7 between the bearing 6 and the collar 9, and this spring 12 has one of its terminals 13 secured to the bearing 6, the other terminal 14 of the spring. 12 being secured to the collar 9. It will therefore be seen that the 'stud 7, with the yoke 8, will be rotated yieldingly in a predetermined direction.

Secured to the beam 5 thereis a ypin 15, for engaging and limiting the movement of i the yoke 8. This yoke 8 has two upwardly- .extending arms 16 each arm having a bearingy 17, 1n which are Journaled the terminals rock shaft 19 thereare plates 20`and 21, the

plates 20 and 21 being spaced apart. The Y plates 21, which are disposed at the inner weight is disposed between the lower terminals of the plates 21, and is held in position by screws 23, which are disposed`V through openings 24 in the plates 21, and mesh in' threaded orifices 25, in the ends Vof the counter-weight 22. This counter-weight 18 of the rock shaft 19. Mounted on this i 22 engages the bottom of the plates 20, and

.as the counter-weight is square in cross section, the engagement of the counter-weight with the plates 20 prevents the rotary movement of the plates 20 relatively to the plates '21. ,Disposed between the plates 20 and 21,

there are sleeves 26, which serve as spacing `members, bolts 27 (being disposed through thesleeves 26, and through orifices in the plates 20 and 21, Lfor holding the sleeves 26 in position. The upper surfaces of the fplates 20 and 21 are cut to form teeth .20a

and 21a. j

It will be seen that in using the invention, the plates 2O and 21 will move sothat the teeth 20et and 21*l will be in position to engage the piece of timber, which is being moved, and that the counter-weight 22 will tend to hold the plates, with their teeth 20a and 21a, in an upward position. Not only is it possible for the timber which is supported by the jack to move vertically with the shaft 19, as its axis, but it is also possible for the timber to move horizontally, with the stud 7 serving as its axis. The piece of timber which is beingmoved may, therefore, be supported by the lumber jack while it is directed in any desired direction.

Having thus described my invention I claimV as new, and desire to secure by Letters Patent:

1. In a lumber jack, a yoke having horizontal bearings and pivoted on a vertical axis, means for engaging the lumber, journaled in the horizontal bearings, and a Vcounter-weight for the said means.

.2. In a lumber jack, a beam having a bearing, a yoke journaled `in the bearing,

and being-provided with bearings, resilient means for turning the yoke relatively to the beam, and means for engaging the lumber, journaled in the bearings in the yoke.

3. In a lumber jack, a beam having a bearing, a yoke journaled in the bearing, and being provided with bearings, resilient means for turning the yoke relatively to the beam, means having teeth for engaging the lumber, and journaled in the bearings in the yoke, and a counter-weight for the said means.

4. In a lumber jack, plates having teeth and spaced apart, means for holding the plates relatively to each other, a counter'- weight spaced from the teeth and secured to the plates, and a yoke to which the plates are pivoted.

5. In a lumber jack, a shaft, two plates having teeth and spaced apart on the shaft, a counter-weight spaced from the teeth and secured to the plates, additional plates spaced apart on the shaft between the firstmentioned plates, the additional plates engaging the counter-Weight.

6. In a lumber jack, plates having teeth and spaced apart, means for holding the plates relatively to each other, a counterweight spaced from the teeth and secured to the plates, a yoke to which the plates are pivoted, a beam having a bearing, and a pin on the yoke j ournaled in t-he bearing.

7. In a lumber jack, plates having teeth and spaced apart, means for holding the plates relatively to each other, a counterweight spaced from the teeth and secured to the plates, a yoke to which the plates are pivoted, a beam having a bearing, a pin on the yoke journaled in the bearing, a pin for limiting the movement of the yoke relatively to the beam, and a pin for rotating the yoke relatively to the beam.

8. -In a lumber jack, bearings, plates having orifices and teeth and spaced apart, a shaft disposed in the orifices in the plates and journaled in the bearings, and a counter-weight secured to the plates.

9. In a lumber j ack, a yoke having bearings, and a depending pin, plates having orifices, and teeth and spaced apart, a shaft disposed in the orifices in the plates and journaled in the bearings, and a counter weight secured to the plates.

10. In a. lumber jack, a yoke having bearings and a depending pin, plates having orifices and teeth and spaced apart, a shaft disposed in the orifices in the plates and journaled in the bearings, a counter-weight secured to the plates, and a member having a vertical bearing in which the depending pin is journaled.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

CHARLES E. EVANS.

Witnesses:

J. M. WHITE, D. L. PRINGLE.

Uopies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents.

- Washington, D. C. 

